Duplex burner



June 3, 1930. E DANIELS 1,761,905 v DUPLEX BURNER Filed July 18, 1928 3 Sheets-Sheet l v N a b I l4 5 Inventor Ill E. 0.Danz'els 24 @ZMM Attorrgqy June 3, 1930. I DANIELS 1,751,905

DUPLEX BURNER Filed July 18, 1928 3 Sheets-Sheet 2 Inventor O..Dano'els June 3, 1930. E. o'. D MELS 1,761,905

DUPLEX BURNER Filed July 18, 1928 3 Sheets-Sheet f5 Invento'r' E OQDanz eZs Patented June 3, 1930 EUGENE ORA DANIELS, OF TOLEDO, OHIO UNITED ST-ATES'P;ATENT OFFICE DUPLEX BURNER Application filed July 18,

The present invention" relates to improvethat is especially adapted to be used inconnection with small and large hot water heaters, stoves, furnaces, kettles and the like.

One of the important objects of the present invention is to provide a burner that includes smaller and larger burner heads, for use dependentupon'the object that is to be heated.

A further object of the invention is to provide a burner capable of using as a fuel, gas or oil, and wherein the burner lncludes a particular form of flame director unlt for directing the heat produced to a surface or surfaces to be heated, and further to so superheat the fuel, whether it be oil or gas, to such'an extent that a more perfect combustion is obtained.

Still .a further object is to provide a burner of the above mentioned character, wherein means is provided for regulating the supply of gasand air to theburner head.

As further object resides in the provision of a burner of the above mentioned character which is simple in construction, inex'- pensive, strong and durable, and further well adapted to the purpose for which it is designed. I

Other objects of the invention reside in the novel arrangement as will become apparent as the nature of the invention proceeds andwhen taken in connection with the accompanying drawings;" v

In'the accompanying drawings, forming a part ofthis application and in which like numerals designate like parts throughout the several views :v y, v

Figure 1 is a vertical sectional view through the duplex burner embodying my invention. V I

I Figure 2 is a view partly in elevation and partly in section of the burner for more clearly disclosing the relationship of the an- 1928. Serial No, 293,773.

nular burner head with respect to the flame deflector unit.

Figure 3 is a top plan view of the annular burner head.

Figure 4: is a top plan view of the flame deflector unit.

Figure 5 is a view partly in elevation, and partly in section of one form of the gas and air mixing device thatvis detachably secured to the inlet nipple associated with the hollow cross arm of the annular burner head.

Figure 6 is a sectional view taken approximately on the line 6-6 of Figure 5, looking downwardly.

Figure 7 is a similar view taken on the line 7-7 of the same figure, looking in the direction ofthe arrows, and

Figure 8 is a transverse section taken on the line 8-8 of Figure 5, looking downwardly, and

Figure 9 is a detail sectional view taken at right angles with respect to the mixing device illustrated in Figure 1' of the type of mixer shown in this figure. a

In the drawings, wherein for the purpose of illustration is shown the preferred embodiment of my invention, the numeral 1 designates a substantially annular burner head that is elliptical in cross section as more clearly disclosed in Figures 1 and 2 of the drawings.

The hollow crossarm'2 which is also-of V elliptical formation in cross section extends directed inwardly and upwardly against the outer face of the saucer like flame deflectorlunit, the construction of which will be hereinafter more fully described.

This hollow cross arm is formed at its intermediate portion at the bottom thereof with the internally threaded circular neck i 4 that extends around a" gas and air inlet plugsimilar to that shown at 8 is. threaded l of the outlet 5 formed in the bottom of this hollow arm and removably secured at its upper end within the depending neck 4 is the nipple 6.

The annular burner head 1 is furthermore formed at its outer peripheral side with the mixed fuel inlet nipple 7 which is located in alignment with the hollow cross arm 2, and a removable plug 8 is threaded in this nipple for closing the same, when the mixed fuelis supplied" to the annular burner head, through the. inlet opening 5.

Obviously, when the fuel is supplied to the burner head 1 through the nipple 7, a

in the neck 4.

Forming the salient part of the present invention is the flame deflector unit, denoted generally by the reference character 9 and the same includes a hub 10 from which extend, at spaced points the radial arms 11 that haveconnection at their outer ends with the lower edge of the saucer-like rim portion 12, as more clearly suggested in Figure 4. An upwardly directed 'annular flange 13 is formed on the'upper edge of the rim 12 and a shoulder'14 is formed on the inner face o'fthis flange 13 as clearly" shown in Figure 4 to provide a rest for the cylindrical shell 15, that fits snugly within the flange 13 as shown in Figure 1.

An annular skirt portion 16 depends fromthe lower edge ofthe rim portion 12 and the outer diameter of this skirt portion 16 is less than the inner diameter of the annular burner head 1 as suggested very clearly in Figure 2 and this skirt portion 16 extends downwardly within the confines of the annular burner head, 'said' skirt portion" being notched at diametrically opposite points as at 17 to engage over" the elliptical shaped cross arm 2 and the hub portion 10 rests; on the central portion of the cross arm, so that said cross arm provides; a supportifor the flame deflector unit v v 9 and by having the skirt portion 16 spaced from the inner peripheral'face of the annular burner head 1, an annular air passage 18-is provided" between the annular burner. head 1 and the skirt portion"16. Furthermore, the radial arms 11 are so formed on their bottom faces as to engage with the hollow cross arm 2 at only two points and air passages 19 are formed between these radial arms 11 as shown in Figure 4.

Cross arm 2' is" formed with a mixed fuel outlet nipple 20 that extends upwardly from the top ofthe central portion of this cross arm for disposition through the hub 10 and the upper portion of this nipple that projects beyond the top of'the hub is externally threaded for receiving the cap shaped burner head 21 that is formed with the radially disposed hollow arms 22 that have communication with the interior of' the burner head, and each of these arms is formed at its. outer end with a flame discharge orifice 23. As clearly shown in Figure 1, the outer ends of these arms 22' terminate inwardly of the saucer-like rim 12 of the, flame deflector unit, sothat the flames will be directed against the inner face of this rim portion and thence deflected upwardly.

threaded cap positioned 'on the upper end therefor.

an important part of the present invention, it will .be observed that the mixer comprises a cylindrical shell 24, 1 that is open-at its upper end and'is of such diam-- eter asto; slidably receive the nipple 6 and tor'the purpose of securing the shell in any vertically adjusted vposition on the nipple,

there is provided 'a' set screw 25 that is, threaded through an opening formed in the upper portion of the shell and the vinner end of this set screw engages with the nipple 6 in the manner asclearly indicated in Figure,1. I

An annular shoulder 26 is, formed on the inner wall of the shell 24, at the intermediate portion-thereof, to providea stopthat is. adapted to-be engaged by the lower end, ofv the nipples 6, whereby to limit the upward I;

its

sliding" movement of the shell on the nipple.

nipple 2O to'provide a closure;

A. horizontalpartition 27 .is arrangedin.

the. lower .portion of the shell 24, intermediate the bottom of said shell and theshoulder .26, as is shown in Figurel, wherebyto devise or form an upper mixing chamber 28,

and a'lower gas; chamber 29. This partition 5 isv formed'with a central gas discharge ori-o fice 30. One side-of 'theimixing chamber 28 is cut-away as at 31, in Figure 9, to provide a'relatively large air inlet opening.

The gas is supplied to the chamber 29 through the. medium of the gas supply pipe 32 that extends upwardly in an opening formed inth'e bottom of the shell 24, as

shownin Figure 1;

Thev gas and air willbecome admixed r together in the chamber28, and the fuel will pass upwardly through the nipple 6 into the a hollow cross arm 2 and from this cross arm thetuel is admittedto the annular burner head 1 and when the fuel is ignited at the face of the saucer like rim 12. Additional air will be directed againstfthe outer wall Thisburner head is used for quickly heating a receptacle supported above the "burner head 21, in any appropriate manner, and when this burner head is not to be used, the same can be removed and a of the rim 12, to aid in the better combustion of the fuel with the air. I

In Figures 5, 6, 7 and 8, there is shown a detailed construction of a modification of the mixer and the same will now be specifically described. A shell 33 is slidably fitted over the nipple 6 and secured thereon by means of the set screw 34. An annular shoulder 35 is formed on the inner wall of the intermediate portion of the shell with which engages the lower edge of the nipple as shown very clearly in Figure 5.3

A partition 36 is arranged horizontally in the shell 33, in spaced relation with respect to the shoulder 35, whereby to provide an upper mixing chamber 37 and a lower gas chamber 38. One side of the mixing chamber 37 is cut away as shown at 39, in Figure 7 to provide a relatively large air inlet opening.

7 The gas chamber 38 is formed with side inlet openings shown at 40 and 41 respectively in Figure 8, to accommodate gas supply pipes, and when only one of said openings is used, the other is closed by means of an appropriate plug.

The central portion of the partition 36 is enlarged and is formed with a gas discharge orifice 42, that tapers smaller toward its upper end and cooperating with this gas-discharge orifice is the pointed upper end of a needle valve 43, the major portion of the stem of which is threaded and the lower end of the shell is formed with a threaded opening through which this threaded stem extends. An actuating handle 44 is associated with the lower projecting end of thevalve stem to facilitate rotation thereof whereby the needle valve 45 may be moved into engagement with the discharge orifice or away from the same to regulate the flow of the gas to the mixing chamber 37 V A knurled nut 46 is threaded on the lower portion of the stem 43 for engagement with the ,boss 47 formed on the bottom of the shell 33 to secure the needle valve in any predetermined adjusted position.

Forthe purpose of regulating the supply of air that is admitted to the chamber 37 I provide the split band 48 that encircles the shell 33 and is adapted for slidable 'movement thereon to partially or'entirely cover the cut-out portion 39. The free ends of 1 this split band are disposed laterally to provide parallel spaced ears 49 that are formed with registering openings to accommodate a bolt 50 and a nut 51 is threaded on the threaded end of the bolt to clamp the ears together whereby to secure the band 48 in any adjusted position on the shell, as is obvious from the construction disclosed in Figures 5 and 6. 1

It will thus be seen from the foregoing description that I have provided a duplex burner that includes a relatively small burner head and a relatively large burner head, and that both may be used in conjunction with one another, and that the relatively smaller burner may be quickly and easily removed when it is desired to use but the large burner head, together with means for closing the opening 20 after the small burner has been removed.

The simplicity of my improved burner enables the parts to be readily and easily assembled or disassembled, and furthermore, the same will at all times be positive and efficient in its operation.

While I have shown the preferred embodiment of my invention, it is to be understood that various changes in the size, shape and arrangement of parts may be resorted to, without departing from the spirit of the invention or the scope of the appended claims.

I claim:

1. In a burner of the class described, an annular hollow burner head formed with a fuel outlet, a circumferentially extending passage in the top thereof, a hollow cross arm extending across the annular burner head and arranged within the confines thereof, the ends of the cross arm having communication with the respective sides of the burner head, a fuel inlet having communication with the hollow cross arm, a flame deflector unit including a saucer like rim adapted for disposition above the annular burner head, and against which the flames are directed, and a skirt portion depending from the lower edge of the rim for disposition within theconfines of the annular burner head, said skirt portion being notched to rest on the cross arm.

2. In a burner of the class described, an annular hollow burner head formed'with a fuel outlet, a circumferentially extending passage in the top thereof, a hollow cross arm extending across the annular burner head and arranged within the confines thereof, the ends of the cross arm having communication with the respective sides of the tion with the hollow cross arm, a flame deflector unit including a saucer like rim adapted for disposition above the annular burner head, and against which the flames are directed, and a skirt portion depending from the lower edge of the rim for disposition with the confines of the annular'burner head, said skirt portion being notched to rest on the cross arm, a fuel outlet nipple extending from the intermediate portion of the hollow crossarm, a cap-like burner head removably secured on the upper end of said nipple for disposition within the central portion of said flamedeflector unit, said caplike burner head being provided with radial outlet openings for projecting the flames against the inner wall of the saucer like rim. 3. In a burner of the class described, an annular hollow burner head formed with a fuel outlet, a circumferentially extending passage in the .top thereof, a hollow cross arm extending. across the annular burner. head and arranged within the confines thereof, the ends of the cross arm having communication'with the respective sides of the 1 burner head, a fuel inlet having communication with the hollow cross arm, a-fla'me deflector unit including a saucer like rim adapted for disposition above the annular burner head and against which the flames are directed, and a skirt portion depending from the, lower edge ofthe rim for disposi-f tion within the confines of the annular burn er head, said skirt portion being notched to rest'on the cross arm, a fuel outlet nipple extending-from the intermediate'portion of the hollow cross arm, a cap-like burner head removably secured on the upper end of said nipple for disposition within the. vcentral portion of said flame deflector unit, said caplike burner head beingprovided with radial outlet openings for projecting the flames against the inner wall of the saucer like rim, said flame deflector unit, further including a hub through which the aforementioned 30-. nipple projects, and arms extending radially from the hub and connected at their outer edge to the lower edge of said rim; e 4. In a burner of the class described, the combination of an annular hollow burner head formed with a fuel outlet, a circumferentially extending passage in the top thereof, a hollow cross arm extending across the annular burner head and arrangedwithin the confines thereof, the ends of the cross 7 40 arm having communication with the respective sides-0f the burner head, a flame deflector unit including a saucerlike rim for disposition about the annular burner head and against which the flames are to be directed, and a skirt portion depending from the lower edge of the rim for disposition within the confines of the annular burner head, said skirt portion being notched to rest on the cross arm, andsaid cross arm having-an inlet opening, a shell associated with the arm and having an open end communicating with the said inlet opening in said arm, a partition arranged within the lower portion of the shell and dividing the same into a lower gas chamber andan upper:

mixing chamber, one side of the mixing chamber being provided with an air inlet opening, a gas supply pipe receiving opening formed in the gas chamber, and said partition being formed with an orifice to admit the gas from the chamber to mix with the air in the shell; p

In testimony whereof I afiix my signature.

- EUGENE ORA DANIELS. 

